1. draft-ietf-teas-yang-l3-te-topo-02
Yang Data Model for Layer 3 TE Topologies draft-ietf-teas-yang-l3-te-topo-02
Xufeng Liu (Volta Networks)
Igor Bryskin (Huawei Technologies)
Vishnu Pavan Beeram (Juniper Networks)
Tarek Saad (Cisco)
Himanshu Shah (Ciena)
Oscar Gonzalez De Dios (Telefonica)

2. Augmentation Hierarchy
L3 TE Topology augments L3 Topology and references TE Topology.
Packet extension module augments ietf-te-topology.
Layer 3 Topology ietf-l3-topology
TE Topology ietf-te-topology
Augment,
a “inheritance” relation
Leafref,
an “association” relation
Layer 3 TE Topology ietf-l3-te-topology
TE Topology Packet Extension ietf-te-topology-packet 2

3. Changes Since Last Revision
Aligned with latest dependencies
Added more detailed descriptions on the model structures
Updated the section of Security Considerations

4. Aligned with latest dependencies
RFC8340: YANG Tree Diagrams
RFC8342: NMDA
RFC8345: Model for Network Topologies
RFC8346: Model for Layer 3 Topologies
draft-ietf-teas-yang-te: Model for TE Tunnels and Interfaces (including ietf-te-types)
draft-ietf-teas-yang-te-topo: Model for TE Topologies

5. Added more detailed descriptions on the model structures
Topology Referencing
augment /nw:networks/nw:network/l3t:l3-topology-attributes:
+--rw l3-te-topology-attributes
+--rw network-ref? -> /nw:networks/network/network-id R1 R2 R3 R6 R7
L3 TE Topology 1
R1’
R2’
R3’
R6’
R7’
L3 Topology 2

6. Added more detailed descriptions on the model structures
Node Referencing
augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes:
+--rw l3-te-node-attributes
+--rw node-ref? leafref
+--rw network-ref? -> /nw:networks/network/network-id
L3 TE Topology 1
L3 Topology 2 R1 R2 R3
R1’
R2’
R3’ R6 R7
R6’
R7’

7. Added more detailed descriptions on the model structures
Link Termination Point Referencing
augment /nw:networks/nw:network/nw:node/nt:termination-point
/l3t:l3-termination-point-attributes:
+--rw l3-te-tp-attributes
+--rw tp-ref? leafref
+--rw node-ref? leafref
+--rw network-ref? -> /nw:networks/network/network-id
L3 TE Topology 1
L3 Topology 2 R1 R2 R3
R1’
R2’
R3’ R6 R7
R6’
R7’

8. Added more detailed descriptions on the model structures
Link Referencing
augment /nw:networks/nw:network/nt:link/l3t:l3-link-attributes:
+--rw l3-te-link-attributes
+--rw link-ref? leafref
+--rw network-ref? -> /nw:networks/network/network-id
L3 TE Topology 1
L3 Topology 2 R1 R2 R3
R1’
R2’
R3’ R6 R7
R6’
R7’

9. Added more detailed descriptions on the model structures
Packet Switching Technology Extensions to TE Link
augment /nw:networks/tet:te/tet:templates/tet:link-template
/tet:te-link-attributes
/tet:interface-switching-capability:
+--rw packet-switch-capable
+--rw minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32
+--rw interface-mtu? uint16
augment /nw:networks/nw:network/nt:link/tet:te
/tet:information-source-entry
+--ro packet-switch-capable
+--ro minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32
+--ro interface-mtu? uint16

10. Added more detailed descriptions on the model structures
Packet Switching Technology Extensions for Performance Metric
augment /nw:networks/nw:network/nw:node/tet:te
/tet:te-node-attributes/tet:connectivity-matrices:
+--rw performance-metric
+--rw measurement |
+--rw normality
+--rw throttle
......

11. Updated the section of Security Considerations
Followed the latest YANG security guidelines

12. Next Steps Add a configuration example and a state example.
Complete and confirm performance metrices (The topic is currently being finalized by TE Tunnel Modeling Team).
Ask for YANG doctor's review.
Welcome further reviews and suggestions.
Working Group Last Call after completing above.

13. draft-ietf-teas-yang-sr-te-topo-02
Yang Data Model for SR and SR TE Topologies draft-ietf-teas-yang-sr-te-topo-02
Xufeng Liu (Volta Networks)
Igor Bryskin (Huawei Technologies)
Vishnu Pavan Beeram (Juniper Networks)
Tarek Saad (Cisco)
Himanshu Shah (Ciena)
Stephane Litkowski (Orange)

14. SR (Segment Routing) Topology
Augment layer 3 network topology model
Layer 3 Network Topology ietf-l3-unicast-topology
Segment Rougint Topology ietf-sr-topology

15. SR (Segment Routing) TE Topology
Multiple inheritance:
Is both SR topology and layer 3 TE topology model.
Uses multiple network types: “l3-te” and “sr”.
SR Topology ietf-sr-topology
Layer 3 TE Topology ietf-l3-te-topology
SR TE Topology

16. Changes Since Last Revision
Aligned with latest dependencies.
Add more detailed descriptions on the model structures.
Covered features:
Link protection.
Link bundle.

17. Aligned with latest dependencies
RFC8340: YANG Tree Diagrams
RFC8342: NMDA
RFC8345: Model for Network Topologies
RFC8346: Model for Layer 3 Topologies
draft-ietf-teas-yang-te: Model for TE Tunnels and Interfaces (including ietf-te-types)
draft-ietf-teas-yang-te-topo: Model for TE Topologies

18. Added more detailed descriptions on the model structures
Topology Attributes
augment /nw:networks/nw:network/l3t:l3-topology-attributes:
+--rw sr
+--rw srgb* [lower-bound upper-bound]
+--rw lower-bound uint32
+--rw upper-bound uint32

19. Added more detailed descriptions on the model structures
Node Attributes
augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes:
+--rw sr
+--rw srgb* [lower-bound upper-bound]
| +--rw lower-bound uint32
| +--rw upper-bound uint32
+--rw srlb* [lower-bound upper-bound]
+--rw node-capabilities
| +--rw transport-planes* [transport-plane]
| | +--rw transport-plane identityref
| +--rw readable-label-stack-depth? uint8
+--ro information-source? enumeration
+--ro information-source-state
+--ro credibility-preference? uint16

20. Added more detailed descriptions on the model structures
Node Prefix Attributes
augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes
/l3t:prefix:
+--rw sr!
+--rw value-type? enumeration
+--rw start-sid uint32
+--rw range? uint32
+--rw algorithm? identityref
+--rw last-hop-behavior? enumeration
| {sid-last-hop-behavior}?
+--rw is-local? boolean

21. Added more detailed descriptions on the model structures
Link Termination Point Attributes
augment /nw:networks/nw:network/nw:node/nt:termination-point
/l3t:l3-termination-point-attributes:
+--rw sr!
+--rw value-type? enumeration
+--rw sid uint32
+--rw advertise-protection? enumeration
+--rw is-local? boolean
+--ro is-backup? boolean
+--ro is-part-of-set? boolean
+--ro is-on-lan? boolean
+--ro information-source? enumeration
+--ro information-source-state
+--ro credibility-preference? Uint16

22. Link protection Added attribute advertise-protection
augment /nw:networks/nw:network/nw:node/nt:termination-point
/l3t:l3-termination-point-attributes:
+--rw sr!
+--rw value-type? enumeration
+--rw sid uint32
+--rw advertise-protection? enumeration
+--rw is-local? boolean
+--ro is-backup? boolean
+--ro is-part-of-set? boolean
+--ro is-on-lan? boolean
+--ro information-source? enumeration
+--ro information-source-state
+--ro credibility-preference? Uint16

23. Link bundle
Re-used the existing modeling construct in ietf-te- topology.yang
augment /nw:networks/nw:network/nt:link:
+--rw te!
+--rw (bundle-stack-level)?
| +--:(bundle)
| | +--rw bundled-links
| | rw bundled-link* [sequence]
| | rw sequence uint32
| | rw src-tp-ref? leafref
| | rw des-tp-ref? leafref
| +--:(component)
| rw component-links
| rw component-link* [sequence]
| rw sequence uint32
| rw src-interface-ref? string
| rw des-interface-ref? string

24. Next Steps Add a configuration example and a state example.
Complete the missing features:
MSD in node capabilities.
Ask for YANG doctor's review.
Update the section of Security Considerations according to latest guidelines.
Welcome further reviews and suggestions.
Working Group Last Call after completing above.